This large volcanic eruption generated so much sulfur dioxide that global temperatures cooled by about 0.5°C for two years following the event.
A. Mount Pinatubo
B. Mount St. Helens
C. Mount Tambora
Answer: A
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If a fusion reaction produces no appreciable radioactive isotopes, why does a hydrogen bomb produce significant radioactive fallout?
A) The fallout is only the radioactive remnants of the bomb's structure and casing. B) It is a misconception that fusion reactions produce no appreciable radioactive isotopes. Therefore, radioactive fallout is unavoidable. C) The radioactive fallout is a result of the fission reaction used to ignite the thermonuclear fusion reaction. D) Once a hydrogen bomb is exploded, all matter within nearly 100 miles becomes radioactive fallout.
True or False: The rocks that originated during or immediately after Earth's planetary formation are not preserved for study
Indicate whether this statement is true or false.
As starlight enters the atmosphere, it often passes through regions of differing air density causing the star to appear to "twinkle", a condition known as ____
A) iridescence B) scintillation C) dispersion D) twilight
Orographic precipitation in the western U.S. is often associated with the Pacific mP air mass
Indicate whether the statement is true or false